Controlling chaos for energy harvesting via digital extended time-delay feedback

Abstract

Chaotic vibrations may appear in nonlinear energy harvesting systems, which can be problematic when using the recovered power, as it may require an extra expenditure of energy to rectify the voltage signal or reduce the harvesting process efficiency when charging the battery. Both cases can derail the energy harvester's functionality. An alternative in this situation is to explore chaos control to stabilize the system dynamics so that the recovered voltage signal is regular and more suitable for use in the applications of interest. This paper address this problem employing an extended delayed feedback method that combines a displacement actuator and a digital controller to implement the control mechanism. The control strategy is mathematically formulated and tested in a bistable energy harvesting system that often operates in a chaotic regime. The controller shows itself capable of stabilizing the chaotic dynamics at a very low energetic cost.

Multistability and Bifurcation Analysis of a Novel 3D Jerk System: Electronic Circuit Design, FPGA Implementation, and Image Cryptography Scheme

“…In recent years, chaotic systems have gained significant attention in various fields, such as control engineering, computer science, information technology, and beyond. This is because chaotic systems have a wide range of applications such as data encryption, secure communication (see [1], [2]), image encryption (see [3], [4]), speech transmission [5], quantum chaos [6], [7], FPGA [8], [9], [10], robotics [11], energy harvesting (see [12], [13]), etc.…”

Slow-Scale Nonlinear Control of a H-Bridge Photovoltaic Inverter

“…It was first proposed by Pyragas [24]. Up to now, TDFC has also been effectively used in the nonlinear control of various nonlinear systems [25][26][27], but there are few reports about its application in the nonlinear control of a dual-loop control H-bridge photovoltaic inverter. There are two main challenges.…”